Hierarchical nanostructured Co0.5Mn0.5WO4 efficient electrode material for asymmetric supercapacitor application

• Published in: Journal of the Taiwan Institute of Chemical Engineers
• Main Author: Varatharajan P.; Mamat M.H.; Vasimalai N.; Rajaji U.; Liu T.-Y.
• Format: Article
• Language: English
• Published: Taiwan Institute of Chemical Engineers 2024
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85198322204&doi=10.1016%2fj.jtice.2024.105649&partnerID=40&md5=5be7511731494ebd06d94525d0925503

Background: This research focuses on the electrochemical characteristics of binary metal tungstates for asymmetric supercapacitor applications. Metal tungstates such as Cobalt tungstate (CoWO4) and Manganese tungstate (MnWO4) exhibit excellent electrical conductivity and redox characteristics. Different combinations of binary metal tungstates can serve as effective electrode materials for supercapacitor applications. Method: Herein, Co0.5Mn0.5WO4 nanoparticles was synthesized by the co-precipitation method followed by calcination. The prepared nanoparticles was used as an electrode material for the supercapacitor application. For study the two electrode system, Co0.5Mn0.5WO4 and activated carbon were worked as anode and cathode electrode, respectively. Significant findings: The prepared electrode materials exhibit a battery type pusudocapacitance in cyclic voltammetry (CV). The charging and discharging properties of the material was analysed by galvanic charging and discharging (GCD) studies and it displays the specific capacitance value of 444 F/g at the current density of 1 A/g and it shows the specific capacitance retention of 91% after 1500 cycles. AC//Co0.5Mn0.5WO4 ASC device shows good energy density, power density and specific capacitance values of 30.5 Wh/Kg, 2800 W/Kg and 112 F/g at 1 A/g current density, respectively. © 2024 Taiwan Institute of Chemical Engineers